MICROANATOMY

Detailed explanation-1: -The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.

Detailed explanation-2: -One molecule of oxygen can bind to the iron atom of a heme group, giving each hemoglobin the maximum capacity to transport four oxygen molecules.

Detailed explanation-3: -View this answer. Hemoglobin that has oxygen attached is called c. oxyhemoglobin. Hemoglobin is responsible for carrying around 98.5% of the oxygen in the bloodstream.

Detailed explanation-4: -Each haem group has an iron molecule. The oxygen binds to the iron molecule. Since there are four iron molecules, each haemoglobin is capable of carrying four oxygen molecules.

Detailed explanation-5: -Hemoglobin can bind to four molecules of carbon dioxide. The carbon dioxide molecules form a carbamate with the four terminal-amine groups of the four protein chains in the deoxy form of the molecule.